相干态统计特性的弱测量结构研究  

Coherent State Statistics Properties in Weak Measurement

作　　者：李钦政 黄靖正[1,2] 曾贵华[1,2] 

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240 [2]上海交通大学量子信息感知与处理中心,上海200240

出　　处：《量子光学学报》2015年第2期99-103,共5页Journal of Quantum Optics

基　　金：国家自然科学基金(项目号:No.61170228;No.61332019)

摘　　要：理论分析相干态位移参数估计在弱测量方法下的放大效应。引入偏振态作为附属态(Ancilla States),分别进行初选择和后选择,中间的相互作用采用了偏振相关的弱位移操作算符。通过最后检测光子数的分布来估计位移参数;在牺牲检测光子强度的情况下可以有效提高放大效应。The study of weak measurement amplification of displacement parameter in coherent state waspresented. Polarization states were used as ancilla states to preand post-select the coherent state. Unlikethe previous theories, the interaction operator is the displacement operator correlated with polarization. Bydetecting the average number and number states, we efficiently provided amplification with the sacrifice thedetected possibility.

关 键 词：相干态 弱测量 弱值 位移操作符 

分 类 号：O411.3[理学—理论物理]